Hildegard Schwammberger ( 1950 - ) is a German painter. Hildegard Schwammberger s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 167.75 USD for Die Heuernte in 2005 to 1725.2 USD for Bouquet of Flowers in a Vase in 2012 , based on the size and medium of the artwork.